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describe("Synth", function() {
var abcThatsAPlenty =
'T:That\'s A Plenty\n' +
'M:4/4\n' +
'L:1/8\n' +
'Q:1/4=220\n' +
'K:Dm\n' +
'P:A\n' +
'"Dm"d2^c2d2c2|d2^cd- dc =c=B|"Gm"_B2A2B2A2|B2AB- BA GF|\n' +
'"A7"E2BA-A4|E2BA-A4|1"Dm"D^C DE FE D^D|"A7"E^D EA-A4:|2A^G AB A=G FE|"Dm"D8y||\n';
//////////////////////////////////////////////////////////
it("drum-intro", function() {
this.timeout(22000);
const tune = abcjs.renderAbc("paper", abcThatsAPlenty, {
add_classes: true,
// visualTranspose: currentTransposition,
// responsive: "resize",
paddingtop: 0,
paddingbottom: 0,
paddingright: 0,
paddingleft: 0,
format: {
vocalfont: "Helvetica 14",
}
});
const meter = tune[0].getMeter();
const synthController = new abcjs.synth.SynthController();
synthController.load("#midi", self.cursorControl, {
displayLoop: true,
displayRestart: true,
displayPlay: true,
displayProgress: true,
displayWarp: true
});
synthController.setTune(tune[0], false, {
// qpm: tempo,
// midiTranspose: currentTransposition,
drum: getDrumString(meter),
drumIntro: 2,
voicesOff: false,
chordsOff: false,
});
return synthController.play().then(function (response){
return sleep(20000).then(function () {
synthController.pause();
});
});
})
it("two-at-once", function() {
this.timeout(5000);
const startTime = Date.now();
const tune = abcjs.renderAbc("paper", "CDEFGA|", {})
const tune2 = abcjs.renderAbc("paper2", "EFGABc|", {})
const midiBuffer = new abcjs.synth.CreateSynth();
const midiBuffer2 = new abcjs.synth.CreateSynth();
const promise1 = midiBuffer.init({
visualObj: tune[0],
millisecondsPerMeasure: tune[0].millisecondsPerMeasure()
})
const promise2 = midiBuffer2.init({
visualObj: tune2[0],
millisecondsPerMeasure: tune2[0].millisecondsPerMeasure()
})
console.log("after init started", Date.now()-startTime)
Promise.allSettled([promise1, promise2]).then(function () {
console.log("init settled", Date.now()-startTime)
const promise3 = midiBuffer.prime();
const promise4 = midiBuffer2.prime();
console.log("after prime started", Date.now()-startTime)
Promise.allSettled([promise3, promise4]).then(function () {
console.log("prime settled", Date.now()-startTime)
midiBuffer.start();
midiBuffer2.start();
console.log("after start", Date.now()-startTime)
})
})
})
// it("swing", function() {
// this.timeout(22000);
// const tune = abcjs.renderAbc("paper", abcThatsAPlenty, {
// add_classes: true,
// });
// const midiBuffer = new abcjs.synth.CreateSynth();
// return midiBuffer.init({
// visualObj: tune[0],
// millisecondsPerMeasure: tune[0].millisecondsPerMeasure(),
// swing: 0.5
// }).then(function (response) {
// return midiBuffer.prime().then(function () {
// midiBuffer.start();
// return sleep(20000).then(function () {
// console.log("finished")
// });
// })
// })
// })
})
function setUpSynth() {
midiBuffer = new ABCJS.synth.CreateSynth();
// midiBuffer.init preloads and caches all the notes needed. There may be significant network traffic here.
return midiBuffer.init({
visualObj: visualObj,
audioContext: audioContext,
millisecondsPerMeasure: visualObj.millisecondsPerMeasure()
}).then(function (response) {
statusDiv.innerHTML += "<div>Audio object has been initialized</div>";
// console.log(response); // this contains the list of notes that were loaded.
// midiBuffer.prime actually builds the output buffer.
return midiBuffer.prime();
}).then(function () {
statusDiv.innerHTML += "<div>Audio object has been primed</div>";
// At this point, everything slow has happened. midiBuffer.start will return very quickly and will start playing very quickly without lag.
midiBuffer.start();
statusDiv.innerHTML += "<div>Audio started</div>";
return Promise.resolve();
}).catch(function (error) {
if (error.status === "NotSupported") {
stopAudioButton.setAttribute("style", "display:none;");
var audioError = document.querySelector(".audio-error");
audioError.setAttribute("style", "");
} else
console.warn("synth error", error);
});
}
function getDrumString(meter) {
let num;
let den;
switch (meter.type) {
case "common_time": num = 4; den = 4; break;
case "cut_time": num = 2; den = 2; break;
default:
num = meter.value[0].num;
den = meter.value[0].den;
}
let drum = "";
switch (num+"/"+den) {
case "2/2":
drum = "dd 76 77 60 30";
break;
case "2/4":
drum = "dd 76 77 60 30";
break;
case "3/4":
drum = "ddd 76 77 77 60 30 30";
break;
case "4/4":
drum = "dddd 76 77 77 77 60 30 30 30";
break;
case "5/4":
drum = "ddddd 76 77 77 76 77 60 30 30 60 30";
break;
case "6/8":
drum = "dd 76 77 60 30";
break;
case "9/8":
drum = "ddd 76 77 77 60 30 30";
break;
}
return drum;
}
function sleep(ms) {
return new Promise(function (resolve) {
setTimeout(resolve, ms);
});
}
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